Eraser.



PATEN-T'ED APR. 17, 1906. E.G.'DANN.

ERASER.

APPLICATION FILED NOV. 24. 1902.

UNITED -'STATES I V I erves: e. AN or -onrrnreo,iLLnvoIs.

i j s egasr-zn, I

i N01 erases;

i itknownthat LERNEST G. DANN, a c tizen of the United States, residing at Chicage;- in-the-county of Cook and State of Illinois, have invented certain new and useful Improvements in Erasers, of whichthe follow ng is specification. l;he;object ofmy invention is to provide a noiseless eraser' madeentirely of non-reso- .nanti. material,- so constructed as toafford a maximum-of wearing and dust-removing qualities and so constructed that it may be manufactured rapidly and cheaply.-

z' Anotherhobject of myinvention is to providea method of- 'niaking this eraser which shall, cheapen its manufacture and'which shall utilize the spreading qualities of the erasing; strips to form an elastic and sufii-' 'cientlycfirm erasing-surface. 2 o;

,The foregoing andsuch other objects as may hereinafter appear, are attained by the devices and the method illustrated in the accompanying drawings; in which' ,Eigures 1 and 2 represent successive steps L ing the practiceof I my method in 1 the manufacture of my improved eraser. -Fig;3 indidrawings, A represents astrip of heavy felt ca-tes a 'pe-rs e'ctive view of a complete eraserin modified orrn. Fig. 4 is across-section of a;cornple'ted=eraser. Figs. 5 and 6 are details of; amedified ccn'structiorn and Fig. -7- is a cross-sectional View of Fig. 3 on the line 7 7.

looking in the-direction indicated by the arrows. I

"Likeletters reference indicate the same .parts intheseveral"figures of the drawings. :Referring by letters. to .the accompanying or. other suitable anon resonant material,

which forms the-back: or handle partof my" able-g-non-resonant material possessing some degree of-elast1c1ty'J- These strips form the rubblngor-erasmgsurface of the: eraser.

i wise suitably secure the strip 0 to the backA on a line near theedge of the back A opposite to the edge to which-the strip B has been attached. I then take fiat strips D, which are approximately twice as wide as the strips B and C, and bending the strips B and C outwardly as far as possible I attach the strips D to'the back A along their central longitudinal line and along a line on the backA which isparallel'with the line of attachment of the A upon a line which'is approximately the center longitudinal line thereof.

It is obvious that by constructing an'eraser in the manner described I produce an eraser which is free from any substance 'WlllOll can either-injure the blackboard or be capable of 1 making any noticeable sound, and by forming the rubbing portion of flat strips which are attached to'the back of the eraser and adjoining eachother' the tendency of each strip to flatten. out is opposed by the flattening tendency of the immediately-adjoining strip, with the result'that the point of equilibrium between these opposing forces is' reached only when the strips are in a position substantially at right angles to the back, and so I produce an eraser'in which the rubbing or erasing,-

surface will not be readily flattenedout or rendered inefiicient when in u'seand in which under ordinary rubbing or' erasing pressure the spaces between the difierent folds of felt forming] the ways orchanne'ls for the recep- -tion of the chalk-dust will be continually opened and closed in a manner which proves most efficient in removing chalk-dust from the board, and because of the material of which this eraser is composed and the manner imwhich-it" is assembled the effect vehfe of thiseraser is prolonged v until the strip s forming the rubbing Surfa'ce are substantially j worn awayg thee'raser meanwhile not only being effective for erasing chalk-marks from a blackboard, but also remaining efficient as a dust-gatherer.

- In Figs. 5, 6, and 7 I have shown a mjodifi cation inthe construction of my eraser. In this modification in place of'the strips D, I use strips (1, which preferably at about their mid-Width are longitudinally out part Way through, as shown in Fig. 5. This facilitates the securing of the erasingetrips to the book piece or handle, still leaving suflioient of the material to e'flord a hold for the stitches, and, furtlierm ore-affords substantially square shoulders which rest egail'lst the beck-piece,

By my method these eresers may be v cheaply and rapidly, may be made of any desired Width," and roe-y be; made-Yin long strips which when made up can be subsequently out intothe proper lengths for the finished eraser-s, I 1'- Various modifications as to the materials used and the means of attachment between the book and the rubbing+surfeeeswill res-d occur, which, however, do .uot depart il fl om the spirit of my invention.

While .I have shown and described mylili VGIltlOIl as a, blackboard-eraser, it obviously' adapted for ma.ny'simi1e,r.u ses sucl 1 as e, sletewleaner, a furniturepolisher-, sl1oeolisher, and the like-end is adopted for various uses Where the absence of any materiel in its composition "which would 'mar or scratch the article to Whicliit is applied will especially 'commendit, arid, allsuoh adaptetio'ns and uses of my invention are contemplated hereby. I Y

I claim- 1. An eraser, comprising a non-resonant back-piece, and a, plurality of'strips of erasing fabric, each strip being folded upon itself and bein stitched to thebeck piecealong the folds edg end eaoh folded strip being being' tightly stitched to the beck-piece along 1 erren ed closely adjacent to the next folded strip, substantially as deser1bed f 1 i An eraser," comprising a Inqu-reson'ahtback-piece ands plurality'ofis'tmps of resiliout erasin jma-terial, eeeh stri being folded u onitse'l' andistitehed to t e fbaCkEflGCG I arranged closely a acentto one another,- so

a ongits folded ed e, eiiid'folded strips eing asto provides mutuelly elastiojsupport,-'substontielly es described. 1 '3. An; eraser, oomprlsljug e non-resonant baclopieoe aridoj plurality of. strips of felt,

each strip of felt being folded upon itself and of strips of erasing fabric folded upouthem erases its folded edge, said folded strips of felt be big arranged closely adjacent to each other, so as to provide a mutual, resilient support, substantially as described,

An eraser, comprising a beck-pir-xee and a plurality of felt. strips, each strip being folded upon itself and also out part Way through alongthe outer'edge of such fold end. being firmly secured to 1 said back-piece along said folded endc-ut edge, seidstrips being arranged eloselyedjecerit to" each other to form a resilient erasiu "and 'dust--oolleet ting; face, substantially as .lieseribed. l

5. Au eraser, comprising a non-resonant beekpiece and a plurality of fion reso'nant erasing-strips, stitched "to-said back-pi and arranged closely" adjecent to each 0 to afford a mutual support and to pro resilient erasing and dust-colleting substantially as described.

6. Aneraser, com risingthe comb atlon with eibeck-piece o- ,nomresonont materiel, '4 selves and out part way through along their folded sol es said strip being 'arrsnged closely ed ecent to feao other, the facesform'e'dby said cutsbeing arranged against ,on'e'face 'oithe baclepieoe, sold st-rips being sewed to said baok-p1ece along the lines of said cuts.

7. An eraser, comprising a baokieceof non-resonant material, provided Wit- 1 folded 1 strips of erasing fabric, attached at their:. 9p folded edges to oneface-of said back-piece-,' ee'ol'i stri being arranged substantially par- .ellel witiievery other strip and, being ii renge immediately adjacent to the next strip, so thatsaidfstripsshall directly su 5 port each other in a'positionsubstential y- Y :it'right angles to. said be'ciepieee, sulwtalwv tially asdescribed: l f 8, An eraser, made Wholly of non-resonant material and com rising a non-resonant 10o back-piece and a p urality of nonresonant strips of resilient erasin fabric,leech strip beiu folded upon itsell and being tightly stitc ed ulon said folded edge to said non- .Tesohant-jbecii ran e'd'closely edj zwent to and parallel with eao .other,. so,-as to afford a mutual support,

said 's'trips soeri'en 'ged, projecting et a right angle to said back-piece and constituting a resilient dust colle'ctin end 'erasir'ig surface. v11c;

E NEST G. DANN. Witnesses; v

.0. R,BAR1-. IETT., 5 E. SHASBERGEB.

piece, said strips being ar- 

